I give you trial product but once you are satisfied and you have enough money , I highly recommend you to buy windows 7 product key to support the developers .

Windows Loader v2.2.2 by Dar for You to Activate Your Windows
The unique thing about this activator is that all the key parts of the exploit are encrypted with a custom encryption. The exploit runs before Windows started up so it’s harder for Microsoft to prevent. It patches all necessary tables making activation look authentic and every user has a unique version of the exploit installed on his/her system

2. You go : Control Panel => System and Security => Change User Account Control Settings => Never notify

3. Download the Latest Version by click here or here .
The unique thing about this activator is that all the key parts of the exploit are encrypted with a custom encryption. The exploit runs before Windows started up so it’s harder for Microsoft to prevent. It patches all necessary tables making activation look authentic and every user has a unique version of the exploit installed on his/her system
5. Restart !!!
Restart

You can watch this video to know how to use Windows Loader :

New feature of Version 2.2.2 (04/03/2014)
* Added a valid OEM SLP key for Windows Server 2012 R2 Standard (it was taken from a Dell server)
* Added support for Windows Server 2012 R2 operating systems
* Added a warning for virtual machines created in VirtualBox that are using Windows Server 2012 or 2012 R2 (use ICH9 for the loader to work)
* Added lots of new keys, SLIC’s and certificates
* Allowed the loader to be installed onto Xen again (if it doesn’t work for you then it can’t be fixed)
* Cleaned up the UI
* Other minor tweaks and fixes